[PATCH V2] spmi: pmic-arb: Move the ownership check to irq_chip callback

[PATCH V2] spmi: pmic-arb: Move the ownership check to irq_chip callback

[Kiran Gunda]

Check the irq ownership in the irq_request_resources callback
instead of checking it during the irq mapping. This can prevent
installing the flow handler for the interrupt that is not owned by the EE
and allow the irq translation during the gpio driver probe.

Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>
---
V2:
Fixed commit message.

V1:
This patch depends on the below patch series. Please take this patch
along with this series.
 drivers/spmi/spmi-pmic-arb.c | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index ca9bdd3..360b821 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -666,6 +666,24 @@ static int qpnpint_get_irqchip_state(struct irq_data *d,
 	return 0;
 }
 
+static int qpnpint_irq_request_resources(struct irq_data *d)
+{
+	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
+	u16 periph = hwirq_to_per(d->hwirq);
+	u16 apid = hwirq_to_apid(d->hwirq);
+	u16 sid = hwirq_to_sid(d->hwirq);
+	u16 irq = hwirq_to_irq(d->hwirq);
+
+	if (pmic_arb->apid_data[apid].irq_ee != pmic_arb->ee) {
+		dev_err(&pmic_arb->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u: ee=%u but owner=%u\n",
+			sid, periph, irq, pmic_arb->ee,
+			pmic_arb->apid_data[apid].irq_ee);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
 static struct irq_chip pmic_arb_irqchip = {
 	.name		= "pmic_arb",
 	.irq_ack	= qpnpint_irq_ack,
@@ -674,6 +692,7 @@ static int qpnpint_get_irqchip_state(struct irq_data *d,
 	.irq_set_type	= qpnpint_irq_set_type,
 	.irq_set_wake	= qpnpint_irq_set_wake,
 	.irq_get_irqchip_state	= qpnpint_get_irqchip_state,
+	.irq_request_resources = qpnpint_irq_request_resources,
 	.flags		= IRQCHIP_MASK_ON_SUSPEND,
 };
 
@@ -707,13 +726,6 @@ static int qpnpint_irq_domain_dt_translate(struct irq_domain *d,
 	}
 
 	apid = rc;
-	if (pmic_arb->apid_data[apid].irq_ee != pmic_arb->ee) {
-		dev_err(&pmic_arb->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u: ee=%u but owner=%u\n",
-			intspec[0], intspec[1], intspec[2], pmic_arb->ee,
-			pmic_arb->apid_data[apid].irq_ee);
-		return -ENODEV;
-	}
-
 	/* Keep track of {max,min}_apid for bounding search during interrupt */
 	if (apid > pmic_arb->max_apid)
 		pmic_arb->max_apid = apid;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

Re: [PATCH V2] spmi: pmic-arb: Move the ownership check to irq_chip callback

[Shawn Guo]

On Wed, Aug 23, 2017 at 06:16:26PM +0530, Kiran Gunda wrote:
> Check the irq ownership in the irq_request_resources callback
> instead of checking it during the irq mapping. This can prevent
> installing the flow handler for the interrupt that is not owned by the EE
> and allow the irq translation during the gpio driver probe.
> 
> Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>

It fixes qcom-spmi-gpio driver probe failure introduced by the series
below.

[PATCH V2 00/12]: spmi: pmic-arb: Support for HW v5 and other fixes

FWIW, Tested-by: Shawn Guo <shawnguo@kernel.org>

Re: [PATCH V2] spmi: pmic-arb: Move the ownership check to irq_chip callback

[Stephen Boyd]

On 08/23, Kiran Gunda wrote:
> Check the irq ownership in the irq_request_resources callback
> instead of checking it during the irq mapping. This can prevent
> installing the flow handler for the interrupt that is not owned by the EE
> and allow the irq translation during the gpio driver probe.
> 
> Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>
> ---

Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project